Gage for saws.



NEWTON S. DAVIS, OF MONTROSE, COLORADO.

GAGE FOR sAws.

Specication of Letters Patent.

Patented Nov. 20, 1906.

Application filed April 18, 1906. Serial No. 312,422.

To all whom t may concern:

Be it known that I, NEWTON S. DAvrs, a citizen of the United States, residing at Montrose, in the county of Montrose and State of Colorado, have invented new and useful .Improvements in Gages for Saws, of which the following is a specification.

My invention pertains to gages for saws; and it contemplates the provision of a simple and inexpensive gage readily applicable to a saw-blade and comprising a gage-bar and means through the medium of which the gage-bar may be expeditiously and easily adjusted to fix the depth of the kerf to be cut, and this without liability of the gage-bar being casually released and changing its position while the saw is in. use.

The invention will be fully understood from the following description and claims when the same are read in connection with the accompanying drawings, forming part of this specification, in whichH4 Figure l is a side elevation of a hand-saw equipped with the gage constituting the present and preferred embodiment of my invention. Fig. 2 is an enlarged transverse section taken in a plane at one side of one clamp of the gage and illustrating the body of the clamp as partly broken or in section. Fig. 3 is an enlarged perspective view illustrating one of the clamps and the threaded rod and adjusting-nut complementary thereto.-

Similar letters designate corresponding parts in all of the views of the drawings, referring to which- A is a blade which may be that of a handsaw, as illustrated, or of any other type of saw.

B is the bar of my novel gage.

C C are the threaded rods, fixedly connected to the bar B.

D D are the clamps for eecting connection between the rods C and the blade A, and E E are the adjusting-nuts, through the medium of which the rods C are adjusted with respect to the clamps D to x the position of the gage-bar B relative to the toothed edge of the saw-blade A. The clamps D are identical in construction, as are also the threaded rods C and the adjusting-nuts E, and for this reason a detailed description of the clamp, the threaded rod, and the adjusting-nut illustrated in Figs. 2 and 3 will suffice to impart an understanding of all. The said clamp D, Figs. 2 and 8, comprises a body a and a setscrew b. The body a is formed in one piece of steel or other material compatible with my invention and is provided with a bifurcation c to receive the upper edge of a sawblade, a lower lateral guide d having a vertically-disposed plain aperture and upper lateral guides e arranged adjacent to each other and also having vertically-disposed plain apertures registered or alined with that in. the guide d. Said body a is also provided on its upper portionwith lugs f, arranged to rest on the upper edge of a saw-blade after the manner shown in Fig. l and in that way prevent swinging or wabbling of the clamp-body on the set-screw b. The threaded rod C extends loosely through the apertures in the guides d and e of the clamp-body a and is engaged and held by the adjusting-nut E, which is arranged and adapted to be turned between the guides e, so as to feed the threaded rod up or down according to the position in which it is desired to place the gage-bar B. The said nut E is preferably, though not necessarily, provided with a milled periphery in order to enable it to be easily turned through the medium of the iingers of the saw-user.

As shown in Fig. 2, the set-screw b bears in a threaded aperture g in one wall of the bifurcation c, and when the clamp is used on an ordinary saw-blade it may be set against one Side of the blade, so as to fix the clamp thereon. When, however, the clamp is used on a saw-blade especially designed for the application of my improvements, which saw-blade is provided with transverse apertures 7L, one for each set-screw b, the other wall of the bifurcation in the clamp will also be provided with a transverse aperture le, alined With the before-mentioned aperture g. From this it follows that the screw b may be introduced through the threaded aperture g in one wall of the bifurcation c, the aperture 7L, in the sawblade, and the other aperture 7c of the clampbody and may then be set against the threaded rod C, this latter to lock the said rod against casual movement and in that way effectually prevent the gage-bar B from working loose and changing its position incident to the use of the saw equipped with my improvements.

In practice the threaded rods C, the clamps D, and the adjusting-nuts E are assembled, as shown in Fig. 1, and when it is desired to use the gage on a saw-blade the gage-bar B is positioned at one side of the blade, and the clamps D are arranged to straddle the blade and are fixed thereon either in the manner TOO IIO

shown in Fig. 2 or in the other manner hereinbefore specifically referred to. Then after the nuts E are adjusted to properly place the gage-bar relative to the toothed edge of the blade A the saw and gage are ready to be used. f Y

In the practical use of the saw equipped with my improvements it will be apparent that when a kerf of the depth desired is cut the gage-bar B will bring up against the upper side ofthe piece of timber, and thereby preclude further deepening of the kerf. It will also be apparent that the adjusting-nuts E, disposed between the guides e on the bodies ofthe clamps are not liable to casually turn, and hence there is no liability of the threaded rods C being released and permitted with the gage-bar B to casually move.

I have entered into a detailed description of the construction and relative arrangement of the parts embraced in the present and preferred embodiment of my invention in order to impart a denite understanding of the said embodiment. I do not desire, however, to be understood as conning myself to the said specific constructionl and relative arrangement ofparts as such changes or modifications may be made in practice as fairly fall within the scope of my claimed invention.

I-Iaving described my invention, what I claim, and desire to secure by Letters Patent, 1s-

The combination of a saw-blade having a transverse aperture, a clamp comprising a body having a bifurcation, alined transverse apertures extending through the walls of said bifurcation; one of said apertures being threaded, and lateral apertured guides loosely receiving the threaded rod, and a screw extending through the apertures in the body of the clamp and the aperture in the saw-blade and engaging the threaded rod and an adjusting-nut arran ed between the said guides of the clamp-body and receiving and engaging the threaded rod.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

" N EWTON p S. DAVIS. Witnesses:

W. A. CAssEL, a J. C. REDDING. 

